JPH0227224Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a railway vehicle in which a bogie supporting a car body is configured to be rotatable in a horizontal plane with respect to the car body, and is suitable for providing a predetermined resistance force against rotational displacement of the bogie. This invention relates to a bogie rotation resistance device for a railway vehicle.

In order to maintain stable running performance during high-speed running, railway vehicles require a large rotational resistance force that suppresses rotational movement between the car body and the bogie. However,
If a large rotational resistance force is constantly applied as mentioned above,
When traveling on a curve, it becomes difficult for the bogie to rotate along the track, and the lateral pressure acting on the wheels increases. As a result, the flange surface is strongly pressed against the rail, which not only causes significant wear on the wheel flange surface, but also
This caused problems such as pushing the rails apart, causing derailments, and causing squeaking noises. An example of a conventional rotational resistance device used between a car body and a bogie will be explained with reference to FIG. FIG. 1 is a side sectional view of a conventional rotational resistance device.
In the figure, reference numeral 1 denotes a cylinder with a spherical bearing 7 mounted on a lid 2 at one end and an open end at the other end. Reference numeral 3 denotes a slide plate that slides on the inner surface of the cylinder 1, and is attached to the outer periphery of a slide plate 4 that is provided with chevron-shaped protrusions on the inside. 5 is presser foot, 6
The spring supports have sloped surfaces corresponding to the protrusions of the sliding plate 4, and are arranged on both sides of the protrusions. Reference numeral 8 denotes a shaft that passes through the presser foot 5 and the spring receiver 6. The presser foot 5 is fixed to one end of the shaft 8, and the spring holder 6 is movable in the longitudinal direction of the shaft 8. By pushing the spring holder 6 with a spring 9, The structure is such that the sliding plate 4 is pressed against the inner surface of the cylinder 1. Spring 9 is attached to shaft 8 with nut 1
It is supported by a spring retainer fixed by 2. A spherical bearing 7' is attached to the other end of the shaft 8 with a nut 12'. In such a configuration, the friction force between the slide plate 3 and the tube 1, that is, the rotational resistance force, is determined by the spring force of the spring 9, and the spring force cannot be changed during running, so running is stable at high speeds. When the spring force is increased to give a high frictional force,
The rotational resistance force increases, the wheel lateral pressure increases when passing through a curve, and the above-mentioned problems occur. In addition, reducing the spring force to lower the frictional force solves the problem when passing through curves, but it has the disadvantage that it causes insufficient rotational resistance when traveling at high speeds, causing problems such as the bogie's snake motion. .

The purpose of this invention is to apply the rotational resistance caused by the rotation of the bogie in the horizontal plane to the car body as a frictional force, to improve the running stability of the vehicle when running at high speed, and to prevent problems when passing through curves. An object of the present invention is to provide a bogie rotation resistance device for a railway vehicle.

The present invention relates to a bogie rotation of a railway vehicle in which a car body is supported on a bogie, and the bogie is installed to be rotatable in a horizontal plane with respect to the car body, and one side is connected to the bogie and the other side is connected to the car body. In a resistance device,
A cylinder whose axis line is arranged horizontally and one end is open; a shaft whose axis line is arranged horizontally and whose one end is inserted into the cylinder; It is characterized by comprising a sliding member that moves in the axial direction, and a frictional force variable means that reduces the sliding frictional force as the amount of axial movement of the sliding member increases.

Next, one embodiment of the present invention will be explained with reference to FIG. In the figures, the same reference numerals as in the conventional example indicate the same members. Reference numeral 13 denotes a low friction coefficient material attached to the inner surface of both ends of the tube 1, and 14 denotes a high friction coefficient material attached to the inner surface of the intermediate portion of the tube 1. Note that the dimensions such as the inner diameter of the low friction coefficient material 13 and the high friction coefficient material 14 are the same. Reference numeral 16 denotes a shaft in which the shaft and the spring retainer in the conventional example are integrally formed. 17 is a cover provided at the open end of the tube 1; 18 is the shaft 1;
This nut is provided at the end of the presser foot 6 and supports the presser foot 5. The variable rotational resistance mechanism configured in this way is installed almost horizontally on the car body and the bogie via the spherical bearings 7, 7', and at this time, the sliding plate 4 and the high friction coefficient material 13 are placed on the entire surface. It is installed so that there is no rotational displacement between the car body and the bogie when they are facing each other and sliding. Therefore, as the trolley rotates, the frictional force decreases in inverse proportion to the increase in the length of extension and contraction of the variable rotational resistance mechanism. For this reason, the pressing force of the high friction coefficient material 14 and the spring 9 is selected so that the sliding plate 4 and the high friction coefficient material 14 can provide a friction force that enables stable running at high speeds. and adjust. In addition, the amount of reduction in frictional force when passing through a curve is as follows: Low friction coefficient material 13
It can be changed by adjusting the selection and the arrangement ratio of the high friction coefficient material 14 and the low friction coefficient material 13. Therefore, according to the above configuration, it is possible to generate a large frictional force when traveling in a straight line, and therefore it is possible to provide a large rotational resistance force against rotation of the bogie during high-speed traveling. Further, when passing through a curve, that is, when the variable rotational resistance mechanism has a long extension/contraction length, the frictional force can be reduced and the rotational resistance force can be reduced, so that the lateral pressure applied to the wheels can be reduced.

Next, another embodiment of the present invention will be explained with reference to FIG. In the figures, the same reference numerals as in the conventional example and the embodiment of the present invention indicate the same members. The configuration of this embodiment will be explained by stating the differences from the previous embodiment. Reference numeral 19 denotes a hollow shaft, and a diaphragm 20 that expands and contracts in the outer circumferential direction by supplying and discharging pressure fluid is provided at one end, that is, the end located inside the cylinder 1. 4' is pin 2 on shaft 19
1, and a slide plate 3 is provided on the outer surface of the slide plate 4'. The sliding plate 3 slides on the inner surface of the cylinder 1. In this configuration, a pressure fluid such as compressed air is supplied into the diaphragm 20 through the shaft 8 to push the sliding plate 4' toward the outer circumferential side, thereby pressing the sliding plate 3 against the inner surface of the cylinder 1. That is, while in the above-mentioned embodiment the frictional force varying means is formed by the low friction coefficient material 13 and the high friction coefficient material 14, in this embodiment the frictional force varying means constitutes the sliding plate 3 by the cylinder 1. It is composed of a diaphragm 20 that is pressed against the inner surface. Therefore, by adjusting the pressure of the pressure fluid supplied to the diaphragm 20, the frictional force between the inner surface of the cylinder 1 and the slide plate 3 can be changed. According to such a configuration, the frictional force, that is, the rotational resistance force is not changed only by the expansion/contraction length of the variable rotational resistance mechanism, but the rotational resistance force is adjusted by the pressure of the pressure fluid supplied to the diaphragm 20. can. Therefore,
According to this configuration, by controlling the pressure within the diaphragm 20 in accordance with the running speed of the vehicle or the radius of the curve of the track on which it runs, it is possible to generate an appropriate frictional force against the rotational displacement of the bogie. . Furthermore, the same effect can be obtained by detecting a situation where the vehicle enters a curve and performing control using this control output. This allows stable running at high speeds, and reduces wheel lateral pressure when passing through curves, thereby preventing problems such as wheel flange wear and squealing noise. In addition, in the explanation of the above embodiment, the friction coefficient of the sliding member or the pressing force of each sliding member is changed, but the same effect can be obtained even if these are combined, and this is not the case in this embodiment. The invention is not limited to the above embodiments.

As explained above, according to the present invention, it is possible to arbitrarily change the rotational resistance associated with the rotation of the bogie relative to the car body in the horizontal plane, improving running stability when the vehicle is running at high speed, and also improving the stability of the wheel flange when passing through a curve. Abrasion or squealing noise can be reduced.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of a conventional friction damper;
FIG. 3 is a side sectional view showing one embodiment of the friction damper according to the present invention, and FIG. 3 is a side sectional view showing another embodiment of the friction damper according to the present invention. 1...tube, 3...sliding plate, 4,4'...sliding plate,
5... Presser foot, 6... Spring holder, 9... Spring, 13
...Low friction coefficient material, 14...High friction coefficient material, 1
6, 19... shaft, 17... cover, 20... diaphragm.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A railway vehicle in which a car body is supported on a bogie, and the bogie is installed to be rotatable in a horizontal plane with respect to the car body. One side is connected to the bogie, and the other side is connected to the car body. In a bogie rotation resistance device for a railway vehicle, a cylinder whose axis is arranged horizontally and one end is open, a shaft whose axis is arranged horizontally and whose one end is inserted into the cylinder, and one end of the shaft which is inserted into the cylinder. It is characterized by comprising a sliding member that is provided on the side and moves in the axial direction within the cylinder, and a frictional force variable means that reduces the sliding frictional force as the amount of axial movement of the sliding member increases. Bogie rotation resistance device for railway vehicles. 2 Utility Model Registration Scope of Claim 1, wherein the frictional force variable means includes a high friction coefficient material disposed on the inner surface of the cylinder at a central portion of the sliding member movement range and facing the sliding member; A bogie rotation resistance device for a railway vehicle, comprising low friction coefficient materials disposed on both end sides of the sliding member movement range on the inner surface of the cylinder to face the sliding member. 3 Utility Model Registration Claim Claim 1 provides that the frictional force variable means includes a pressing force adjusting means for pressing the sliding member against the inner surface of the cylinder and varying the pressing force, and a relative position between the sliding member and the cylinder. A bogie rotation resistance device for a railway vehicle, comprising a controller that reduces the pressing force of the pressing force adjusting means as displacement increases. 4 Utility model registration Claim 1, wherein the frictional force variable means includes a pressing force adjusting means for pressing the sliding member against the cylinder inner surface and varying the pressing force; 1. A bogie rotation resistance device for a railway vehicle, comprising a controller for reducing the pressing force of a pressing force adjusting means.